Are 401k Plan Loans Double Taxed?

Are 401k plan loans double taxed? As outlined in the example below, it appears that the principal amounts of 401k loans that are distributed at retirement are taxed at a rate that is more than double that of a participant’s incremental tax rate.


  • 401k plan loan amount of $10,000.
  • Payroll deduction is the only way to pay back this loan.
  • The participant is in the 25% federal tax bracket while working and when retired.
  • No state taxes.
  • To eliminate the impact of interest, assume the interest rate on this 401k plan loan is 0%.
  • To simplify the example, assume only one payroll deduction payment for $10,000 to pay back the loan.


Loan origination: $10,000, no tax impact

Loan payback: One $10,000 payroll-deducted after-tax payment. $13,333 in gross earnings needed to realize the $10,000 after-tax payment resulting in $3,333 in taxes attributable to the payment.

Distribution of this $10,000 at retirement: $10,000 taxed at 25% resulting in $2,500 in taxes.

The total taxes paid on the $10,000 used for the 401k plan loan and then distributed at retirement are $5,833 (58%), more than double the amount of $2,500 (25%) that would be paid on a $10,000 distribution at retirement.

Same as any other loan?

Many financial experts believe that 401k loans are not double taxed. They say that the overall tax treatment of the individual is the same whether he/she takes a 401k plan loan or a loan from somewhere else. An equivalent amount of taxes would be required to pay back a loan from any other lender. I agree. However, that does not change the fact that a participant appears to experience a tax on the principal portion of 401k loans that is more than double his/her incremental tax rate.

401k loans are bad

I believe that taking 401k loans is a bad financial decision, for many reasons. One reason is that the loan interest is not tax deductible (like a home equity loan). Also, the lender (the plan) is required to lend to a borrower (the participant) regardless of whether the participant is creditworthy. So 401k plans often become the lender of last resort for many participants who have no business taking on additional debt. Many of these participants end up defaulting on their loans if they lose their jobs or leave for new jobs because participant loans become immediately due in most plans when a participant separates from service.

In addition, most participants who take 401k loans end up reducing or stopping their contributions while making loan payments. As a result, they often lose company matching contributions since they no longer contribute up to the maximum matched percentage.

What do you think, are 401k loans double taxed? Is taking a 401k plan loan a bad financial decision?


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